As far as specs go...
You almost need a degree in acoustic engineering to REALLY sort out those specs. This is especially true when you start to look at S/N data. There are several tricky ways to get specs to look great at first glance. So, like Bruce said, use your ears. You know you can trust those right?
Just saw the last post... If you take for instance the specs of a Nt1 and a 4033 you get this...
Frequency response: 20 Hz-20kHz
Noise: 17dB
Max SPL: 135 dB
Output impedance: 200 ohms
Power requirement: 48V D.C.
Frequency Response: 30 Hz to 20 kHz
Maximum Input Sound Level: 145 db SPL
Noise: 17 db
Signal/Noise Ratio: 77 db
Requires 48 volt phantom power
Which would you choose on specs alone?
Basically what I'm saying is if you just want a good sounding mic, use your ears. Period. If you really want to dig deep into specs etc. then go to the library and read up. Understanding the specs isn't going to help you a whit in most cases if your goal is to get the "best" mic. Most of 'em are identical, and in the end you can't trust them anyhow. Far more important than specs is the wiring, the quality control etc.
If I misunderstand your intent, and you are basically asking "what do they mean?" out of curiosity then I apologize. If such is the case then I'll have to pass to someone who has a better understanding of the more arcane specifications.
-Val